APA引文

H G Zandstra. (1981). A methodology for on-farm cropping systems research. Philippines: IRRI.

Trích dẫn kiểu Chicago

H G Zandstra. A Methodology for On-farm Cropping Systems Research. Philippines: IRRI, 1981.

MLA引文

H G Zandstra. A Methodology for On-farm Cropping Systems Research. Philippines: IRRI, 1981.

警告：這些引文格式不一定是100％准確.